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I'm working on a project where i find i'm checking for the following in many, many places: if(item.Rate == 0 || item.Rate == null) { } more as a curiousity than anything, what's the best way to check for both cases? I've added a helper method which is: public static bool nz(object obj) { var parsedInt = 0; var parsed = int.TryParse(obj.ToString(), out parsedInt); return IsNull(obj) || (parsed && parsedInt == 0); } Is there a better way? eglasius I like if ((item.Rate ?? 0) == 0) { } Update 1: You could also define an extension method like: public static bool IsNullOrValue(this double? value,

Below is a section of code which is part of a functional decryption and encryption program. while checkvar < maxvar: # is set to < as maxvar is 1 to high for the index of var #output.append("%02d" % number) i =ord(var[checkvar]) - 64 # Gets postional value of i i = ("%02d" % i) if (checkvar + 1) < maxvar: j =ord(var[(checkvar + 1)]) - 64 # Gets postional value of i j = ("%02d" % j) i = str(i) + str(j) #'Adds' the string i and j to create a new i li.append(int(i)) checkvar = checkvar + 2 print li As you can see the two variables i and j are first treated as string to add a 0 in front of any

I've got a double that prints as 0.000000 and I'm trying to compare it to 0.0f , unsuccessfully. Why is there a difference here? What's the most reliable way to determine if your double is zero? To determine whether it's close enough to zero that it will print as 0.000000 to six decimal places, something like: fabs(d) < 0.0000005 Dealing with small inaccuracies in floating-point calculations can get quite complicated in general, though. If you want a better idea what value you've got, try printing with %g instead of %f . You can do a range. Like -0.00001 <= x <= 0.00001 This is fundamental

This question already has an answer here: Formatting a number with leading zeros in PHP 14 answers PHP - Is there a quick, on-the-fly method to test for a single character string, then prepend a leading zero? Example: $year = 11; $month = 4; $stamp = $year.add_single_zero_if_needed($month); // Imaginary function echo $stamp; // 1104 You can use sprintf: http://php.net/manual/en/function.sprintf.php <?php $num = 4; $num_padded = sprintf("%02d", $num); echo $num_padded; // returns 04 ?> It will only add the zero if it's less than the required number of characters. Edit: As pointed out by

I've seen this notation used a lot, and I was wondering, is there is any notable difference between these two notations? element#id { property: 0; } and element#id { property: 0px; } I use property: 0px; all the time, as I find it cleaner looking, but I'm not really sure if the browser interprets 0px differently than 0 . Does anyone know which one is better or correct? Unit identifiers are optional , but there is no noted performance increase (although you are saving two characters). CSS2 - From W3C CSS 2.1 Specification for Syntax and basic data types : The format of a length value (denoted

最近工作需要用到springmvc4,很久没用spring了变化还是很大,记录下搭建一个基于annotation的零配置文件的spring、springmvc、jpa、bootstrap的简单框架。 开发环境 开发工具:spring sts 3.6.4 jdk：1.7.55 64 bit web server: Pivotal tc Server Developer Edition (Runtime) v3.1 mysql: 5.5.23 maven:3.2.3 springmvc annotation @Configuration ： 类似于spring配置文件，负责注册bean，对应的提供了@Bean注解。需要org.springframework.web.context.support.AnnotationConfigWebApplicationContext注册到容器中。 @ComponentScan ： 注解类查找规则定义 <context:component-scan/> @EnableAspectJAutoProxy ： 激活Aspect自动代理 <aop:aspectj-autoproxy/> @Import @ImportResource: 关联其它spring配置 <import resource="" /> @EnableCaching ：启用缓存注解